Primaquine Therapy for Plasmodium falciparum Infection

Important Considerations

G6PD testing should be performed before administering primaquine due to the risk of hemolysis in G6PD-deficient individuals, as recommended by the Clinical Microbiology and Infection guidelines 1, 2
Primaquine is contraindicated during pregnancy and breastfeeding, according to the Clinical Microbiology and Infection guidelines 1, 3
Primaquine for P. falciparum should always be given in conjunction with appropriate blood schizontocidal therapy such as artemisinin-based combination therapies (ACTs), as recommended by the Clinical Microbiology and Infection guidelines 1, 4

For P. vivax/P. ovale infections, a 14-day regimen of 30 mg base per day for 14 days (0.5 mg/kg/day) is recommended for radical cure to prevent relapse by eliminating liver hypnozoites, as stated in the Clinical Microbiology and Infection guidelines 1, 2

Confusing P. falciparum and P. vivax dosing regimens can be avoided by understanding that P. falciparum does not form hypnozoites, and using the 14-day regimen for P. falciparum is unnecessary, as recommended by the Clinical Microbiology and Infection guidelines 1, 3
Omitting G6PD testing is a common pitfall, even with the single low dose, G6PD testing is recommended as a precautionary measure, according to the Clinical Microbiology and Infection guidelines 2
Using primaquine as monotherapy is not recommended, primaquine should always be used in conjunction with effective blood schizontocidal drugs for P. falciparum, as stated in the Clinical Microbiology and Infection guidelines 1, 4

Confirming P. falciparum infection through microscopy or rapid diagnostic test is the first step in the treatment algorithm, as recommended by the Clinical Microbiology and Infection guidelines 1
Testing for G6PD deficiency is a crucial step in the treatment algorithm, as recommended by the Clinical Microbiology and Infection guidelines 2
Initiating appropriate blood schizontocidal therapy (ACTs preferred) is a key step in the treatment algorithm, as recommended by the Clinical Microbiology and Infection guidelines 1, 4